ViaSat Litigation Update

RICHMOND, BC, April 24, 2014 /CNW/ -MacDonald, Dettwiler and Associates Ltd. ("MDA" or the "Company") (TSX:MDA), a global communications and information company, announced today that
a jury in the United States District Court for the Southern District of
California has returned a verdict in the action of ViaSat
Communications, Inc. against MDA's subsidiary Space Systems/Loral, LLC
("SSL") involving claims of patent infringement and breach of contract.
The jury found that SSL infringed ViaSat patents and breached certain
non-disclosure obligations to ViaSat. The jury awarded US$283 million
in damages for patent infringement and for breach of contract.

SSL will seek to overturn the verdict in post-trial motions it will file
with the District Court, and if necessary, through the appeal process.

The ViaSat patents involved in this action may have some applicability
to a limited number of satellite projects that are currently in SSL's
factory and in its current pipeline of identified bid opportunities.

Under the purchase and sale agreement under which MDA purchased SSL from
Loral Space and Communications Inc., MDA is indemnified for certain of
the costs and damages, if upheld, under this action.

About MDA

MDA is a global communications and information company providing
operational solutions to commercial and government organizations
worldwide.

MDA's business is focused on markets and customers with strong repeat
business potential. In addition, the Company conducts a significant
amount of advanced technology development.

MDA's well-established global customer base is served by more than 4,800
employees operating from 11 offices located in the United States,
Canada, and internationally.

This release contains forward-looking statements and information, which
reflect the current view of MacDonald, Dettwiler and Associates Ltd.
("MDA" or the "Company) with respect to future events and financial
performance. The forward-looking statements in this regard include
statements regarding the award of a government contract. Any such
forward-looking statements are based on MDA's current expectations,
estimates, projections and assumptions in light of its experience and
its perception of historical trends. The factors and assumptions
underlying the forward-looking statements in this release include any
subsequent determinations made by the trial judge, including any
injunctions, as a result of motions made, or any determinations made on
any appeal, if taken, could be contrary to the verdict of the jury,
which may include an award of damages and that a jury may find any
infringement willful and award enhanced damages and whether contracts
will be awarded to SSL for satellites. Any such forward-looking
statements are subject to a number of risks and uncertainties that
could cause actual results to differ materially from current
expectations. MDA cautions readers that should certain risks or
uncertainties materialize, or should underlying assumptions prove
incorrect, actual results may vary significantly from those expected.
The risks that could cause actual results to differ from current
expectations include, but are not limited to: changes in government
priorities, mandates, policies, funding levels, contracts and
regulations; failure of third parties and subcontractors; and failure
of systems to meet performance requirements.

For additional information with respect to certain of these risks or
factors, plus additional risks or factors, reference should be made to
the Company's continuous disclosure materials filed from time to time
with Canadian securities regulatory authorities, which are available
online under the Company's profile at www.sedar.com or on the Company's website at www.mdacorporation.com.

The Toronto Stock Exchange has neither approved nor disapproved the form
or content of this release.